| Year: | 1999 |
| Type: | Off-year elections |
| Election Day: | November 2 |
| Special Elections: | Congressional special elections |
| Special Elections Seats Contested: | 3 |
| Special Elections Net Change: | 0 |
| Governor Seats Contested: | 3 |
| Governor Net Change: | Democratic +1 |
| Governor Map Caption: | 1999 Gubernatorial election results map |
| Legend: | |
The 1999 United States elections, which were held on Tuesday, November 2, were off-year elections in which no members of the Congress were standing for election. However, there were three gubernatorial races, state legislative elections in four states, numerous citizen initiatives, mayoral races in several major cities, and a variety of local offices on the ballot.
In 1999, three special elections to fill vacancies in the House of Representatives were held. They were for,, and .
See main article: 1999 United States gubernatorial elections. Three states held elections for governor in 1999. Kentucky and Mississippi voted on November 2. Louisiana's election dates do not coincide with that of most states: Louisiana held its open primary on October 23. A runoff election was not needed.
In the three states which held regularly scheduled state general elections, elections for state executive branch offices of Lieutenant Governor (in a separate election in Louisiana and Mississippi and on the same ticket as the gubernatorial nominee in Kentucky), Secretary of state, state Treasurer, state Auditor, state Attorney General, and Commissioners of Insurance and Agriculture were held. In addition, there was also elections for each states' respective state Supreme Courts and state appellate courts.
Four states and one territory held elections for their state legislatures.
Many major American cities held their mayoral elections in 1999.